CN118054841A - Satellite communication-in-motion system based on mechanically movable spot beam and accompanying guarantee method - Google Patents
Satellite communication-in-motion system based on mechanically movable spot beam and accompanying guarantee method Download PDFInfo
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Abstract
The invention discloses a satellite communication-in-motion system based on a mechanically movable spot beam and an accompanying guarantee method, and belongs to the field of satellite communication. The system comprises a communication satellite in a space section, a gateway station, a measurement and control station, a management and control center in a ground section, a satellite earth station, a satellite-earth link and an inter-satellite link in a user section. The invention has good applicability to high maneuvering platforms with wider range of motion, such as on-board and on-board, and adopts the satellite movable spot beam to maneuver and cover the high maneuvering target user, so that the communication-in-motion earth station of the high maneuvering satellite can perform open sea remote area communication under the accompanying guarantee of the mechanical movable spot beam. The coverage area of the mechanically movable spot beam is approximately circular with the diameter of hundreds of kilometers, the gain of a beam antenna is relatively high, the spatial isolation of signals is good, and the mobile communication guarantee requirements of single satellite mobile communication earth station users or multiple satellite mobile communication earth station user groups can be met.
Description
Technical Field
The invention belongs to the field of satellite communication, in particular to the field of satellite communication in motion of high-mobility platforms such as airborne and shipborne, and particularly relates to a system and a method for providing offshore remote area concomitant assurance communication for the high-mobility platform by utilizing an on-board mechanically movable spot beam.
Background
Satellite communication in motion is an abbreviation of a satellite earth station communication system in motion, and is broadband mobile satellite communication realized based on fixed satellite service and broadcast satellite service resources of a geostationary orbit satellite. In recent years, satellite communication has been and rapidly developed driven by demands for remote, broadband multimedia, emergency communication and the like in motion. The available spectrum bandwidth of the C, ku, ka bands allocated to the fixed satellite service and the broadcast satellite service by ITU is large, and the communication rate required for communication in motion is fully satisfied. The satellite communication-in-motion earth station is integrated on mobile carriers such as airplanes, ships and automobiles, well solves the problem that various mobile carriers continuously transmit comprehensive service information such as voice, data, video images and faxes in real time through earth-to-earth static satellites in motion, is a major breakthrough in the communication field, is an application field with vigorous requirements and rapid development in the current satellite communication field, has very wide development prospects in the military and civil fields, and receives great importance from various countries.
The traditional geostationary orbit satellite has the characteristics of fixed beam coverage and wide range, but relatively low satellite beam gain, especially when used for the user service transmission of satellite communication-in-motion earth stations, the satellite communication-in-motion earth stations are limited by the loading capacity of a platform, the antenna receiving and transmitting gain and the radio frequency capacity are usually weak, and the transmission performance is limited. For vehicle-mounted satellite communication-in-motion earth stations, the coverage range of regional beams can meet the use requirements. However, for the airborne and shipborne equal-altitude motorized platforms, the movable range is wider, and the use requirements of the remote areas in the open sea, which are not covered by regional beams, cannot be met.
Disclosure of Invention
In order to solve the problems, the invention provides a satellite communication-in-motion system based on a mechanically movable spot beam and an accompanying guarantee method. The system adopts the movable spot beam on the satellite to carry out maneuvering coverage on the high maneuvering target user, so that the communication-in-orbit earth station of the high maneuvering satellite can carry out open sea remote domain communication under the accompanying guarantee of the mechanically movable spot beam. The method can ensure that the mechanically movable spot beam on the satellite always points to and stares at the high-mobility satellite communication-in-motion earth station, and the high-mobility satellite communication-in-motion earth station can complete communication processes such as network access, service call, service transmission and the like under the mechanically movable spot beam.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
a high mobility satellite communication-in-motion system based on an on-board mechanically movable spot beam, comprising: communication satellites of space segments, gateway stations, measurement and control stations and management and control centers of ground segments, satellite earth stations, satellite-earth links and inter-satellite links of user segments;
the communication satellite provides a communication relay function for a satellite earth station, the orbit of the communication satellite is a geostationary orbit, a plurality of geostationary orbit satellites cover the world, the effective load of each communication satellite is provided with a global signaling beam antenna and a plurality of mechanically movable spot beam antennas, and the communication satellite covering the territory range is also provided with a feed beam antenna and a regional beam antenna;
The gateway station, the measurement and control station and the management and control center are all positioned in the territory range and are mutually interconnected through a ground network; the gateway station is positioned in the coverage area of the feed beam and provides a satellite-ground feed link for transmitting signaling data in a global signaling beam of a served satellite, service data of a user section, and service data and measurement and control data forwarded by an overseas satellite with invisible territory range through an inter-satellite link relay; the measurement and control station provides a satellite-to-ground remote control telemetry link, receives working state parameters of load equipment acquired by the satellite measurement and control subsystem through a downlink telemetry link, transmits remote control instructions to the satellite measurement and control subsystem through an uplink telemetry link, and transmits the remote control instructions to the satellite equipment through a satellite data management system to be executed, so that the control of a ground section on a mechanically movable spot beam antenna is realized; the management control center completes management control, operation control and task planning of the satellite;
the satellite earth stations comprise high mobility satellite communication-in-motion earth stations under the coverage of mechanical movable spot beams and various satellite earth stations under the coverage of regional beams;
The satellite-to-ground link comprises: an uplink and downlink feed link between the gateway station and the satellite feed beam antenna; a measurement and control link between the measurement and control station and the on-board measurement and control subsystem; a random access link between the satellite earth station and the on-board global signaling beam antenna; a user traffic link between the satellite earth station and the mechanically movable spot beam antenna and the area beam antenna;
the inter-satellite link is a space link between communication satellites, and supports relay transmission of inter-satellite communication service and measurement and control service.
Further, the global signaling beam antenna adopts a horn antenna with a field of view of 17.4 degrees to the earth, forms a fixed coverage area covering 1/3 of the earth surface, and is used for random access of all satellite earth stations in a user section.
Further, the mechanically movable spot beam antenna adopts a high-gain mechanically rotary parabolic antenna, and the antenna beam is projected to be approximately circular coverage area on the surface of the earth; the mechanically movable spot beam antenna rotates under the control of the command of the on-satellite measurement and control subsystem, the ground view field of the antenna rotating is 17.4 degrees, and a maneuvering coverage area covering 1/3 of the earth surface is formed; mechanically movable spot beams are used for user traffic links of high mobility satellite earth stations in the user segment.
Further, the feed beam antenna points to the gateway station of the ground section and is used for forwarding signaling data and user service data of the high mobile satellite earth station under the mechanically movable spot beam through the feed link.
Further, the area beam antenna is used for covering a country territory and a surrounding or a shaping area of a specific area, and is used for covering all satellite-earth user service links in the user section.
The high mobility satellite communication-in-motion accompanying guarantee method based on the mechanically movable spot beam comprises the following steps:
(1) Powering on and starting up the high-mobility satellite power-on earth station equipment and completing self-checking, and turning to the step (2);
(2) The antenna control unit of the high maneuvering satellite communication-in-motion earth station reads pre-stored target satellite parameters including longitude, receiving and transmitting polarization mode and beacon frequency of the satellite, and issues and sets the target satellite parameters to the tracking receiver; the antenna control unit calculates the azimuth angle, pitch angle and polarization angle parameters of the antenna pointing according to the position of the high maneuvering platform and the longitude of the target satellite, and points the antenna to the target satellite, and the tracking receiver completes the satellite-forming process according to a closed-loop tracking mode and keeps tracking and locking states;
(3) The high mobility satellite communication-in-motion earth station initiates and completes a random access process under a global signaling beam;
(4) The high mobility satellite communication-in-motion earth station completes the application process of the mechanically movable spot beam resource under the global signaling beam;
(5) Mechanically movable spot beams point to and gaze at high mobility satellite earth stations in motion;
(6) The high mobility satellite communication-in-motion earth stands under the user service link of the mechanically movable point wave to finish the network access process;
(7) The communication process of service calling and transmission is carried out by the earth station of the high mobility satellite communication in motion under the user service link of the mechanically movable point wave;
(8) The high mobility satellite communication-in-motion earth station completes the release of the mechanically movable spot beam resources through signaling interaction under the global signaling beam;
(9) The satellite station in motion of high mobility satellite completes the exit of random access through signaling interaction under the global signaling beam.
Further, the specific mode of the step (3) is as follows:
(301) The method comprises the steps that a high mobility satellite communication-in-motion earth station reads and sets channel parameters of a preset global signaling beam downlink access link, wherein the channel parameters comprise carrier frequency, channel rate and modulation coding modes;
(302) The high mobility satellite communication-in-motion earth station receives and captures the carrier signal of the downlink access link of the global signaling beam; if the carrier synchronization and the demodulation decoding synchronization, the step (303) is performed; otherwise, repeating step (302);
(303) The high mobility satellite communication-in-motion earth station receives a periodic broadcast notification signaling forwarded to a global signaling downlink by an uplink feed link of a gateway station from a management and control center on a downlink access link of a global signaling beam; if the broadcast notification signaling is received correctly, go to step (304); otherwise, repeating step (303);
(304) The mobile earth station of the high mobility satellite analyzes, issues and sets channel parameters of the uplink of the global signaling beam in the broadcast notification signaling, wherein the channel parameters comprise carrier frequency, channel rate and modulation coding mode;
(305) The high mobility satellite communication-in-motion earth station transmits a random access request message containing user identity and authority information of the earth station to a gateway station on a global signaling beam uplink access link;
(306) The gateway station transmits the random access request to the management and control center after receiving the random access request, and the management and control center performs identity authentication on the communication-in-motion earth station of the high maneuver satellite; if the verification is passed, the step (309) is carried out; otherwise, go to step (307);
(307) The control center sends a response message of refusing access to the mobile communication earth station of the high mobility satellite through a global signaling beam downlink access link by the gateway station;
(308) The earth station in communication with the high mobility satellite performs exception processing according to the reason in the refused access response message, and the step (305) is carried out after the processing is completed;
(309) The control center sends a response message allowing access to the mobile communication earth station of the high mobility satellite through a global signaling beam downlink access link by the gateway station;
(310) The high mobility satellite communication-in-motion earth station transmits an access confirmation message to the gateway station through the global signaling beam uplink, and the high mobility satellite communication-in-motion earth station completes the random access process under the global signaling beam.
Further, the specific mode of the step (4) is as follows:
(401) The high mobility satellite communication-in-motion earth station initiates a request for using the mechanically movable spot beam resources through a global signaling beam uplink, and the request message comprises the current position of the earth station and the content of guaranteeing whether a using mode is mobility accompanying guarantee or fixed coverage guarantee or using duration;
(402) The gateway station receives the message of the mechanical movable spot beam resource using request through the feed beam downlink and forwards the message to the control center through the ground network, and the control center generates a response feedback message of the request according to the available condition of the mechanical movable spot beam resource on the satellite; if the mechanical movable spot beam resources are allocated, the response feedback message comprises the beam number of the mechanical movable spot beam and the broadcast notification channel parameters of the user service link under the mechanical movable spot beam; if the mechanical movable spot beam resources are not allocated, the response feedback message comprises unallocated reasons and the time for waiting continuously;
(403) The control center forwards the response feedback information of the mechanical movable spot beam resource use request to the gateway station through the ground network, and the gateway station forwards the response feedback information to the downlink access link of the global signaling beam through the uplink of the feed beam through the satellite; if mechanically movable spot beam resources are allocated, performing step (406) synchronously;
(404) After receiving the response feedback message of the mechanical movable spot beam resource use request through the downlink access link of the global signaling beam, the high mobility satellite communication-in-motion earth station shifts to step (405) if the mechanical movable spot beam resource is not allocated; if mechanically movable spot beam resources are allocated, then go to step (407);
(405) The high mobility satellite communication-in-motion earth station is switched into a queuing waiting state according to the waiting time given in the feedback message; in the waiting process, if a feedback message that the mechanically movable spot beam resource is available is received through the global signaling beam downlink, the step (407) is shifted to; otherwise, after waiting for ending, go to step (401);
(406) The control center sends a calling instruction of the mechanical movable spot beam to the measurement and control station through the ground network, the measurement and control station sends a movement control instruction of the selected mechanical movable spot beam to the on-board measurement and control subsystem through the measurement and control link, and the on-board measurement and control subsystem directs the selected mechanical movable spot beam to the high-mobility satellite on-the-fly earth station;
(407) The high mobility satellite communication-in-motion earth station completes the application process of the mechanically movable spot beam resource use under the global signaling beam.
Further, the specific mode of the step (5) is as follows:
(501) The high mobility satellite communication-in-motion earth station predicts the expected position of the next adjustment period of the mechanical movable spot beam according to the current position, the heading, the speed and the acceleration of the station;
(502) The high mobility satellite communication-in-motion earth station reports the self expected position information to the gateway station through a user link under the mechanically movable spot beam;
(503) The gateway station receives the expected position report message from the high mobility satellite communication-in-motion earth station through the feed beam feed downlink;
(504) The gateway station reports the expected position of the high mobility satellite communication-in-motion earth station to a management and control center through a ground network, and the management and control center generates a movement instruction of a mechanical movable spot beam according to the expected position;
(505) The control center sends a movement instruction of the mechanical movable spot beam to the measurement and control station through the ground network, the measurement and control station sends a movement control instruction of the mechanical movable spot beam to the on-board measurement and control subsystem through the measurement and control link, and the on-board measurement and control subsystem directs the mechanical movable spot beam to the expected position of the high maneuver satellite on-the-fly earth station;
(506) If the situation that the tracking of the mobile satellite communication-in-motion earth station of the high mobile satellite is lost occurs, reporting an expected position message by the mobile satellite communication-in-motion earth station of the high mobile satellite through an access link under a global signaling beam, and rapidly recovering the mobile satellite communication-in-motion earth station of the high mobile satellite under the control of a management and control center;
(507) Steps (501) - (506) are performed in a loop to ensure that the mechanically movable spot beam is always directed and focused at the high mobility satellite earth station in motion.
Further, the specific mode of the step (6) is as follows:
(601) The mobile satellite communication-in-motion earth station sets parameters of a receiving channel according to the parameter content of a broadcast notification channel of a mechanical movable spot beam downlink user service link, receives broadcast notification signaling in the mechanical movable spot beam downlink user service link, and analyzes the channel parameters of a user service uplink in the broadcast notification signaling and sets parameters of a transmitting channel if the broadcast notification signaling is received;
(602) The high mobility satellite communication-in-motion earth station initiates a network access request to a management and control center through a user service link under a mechanically movable spot beam;
(603) The management and control center completes network access verification and forwards a feedback message of the network access request response to the earth station of the mobile satellite of high mobility through the gateway station;
(604) And the high mobility satellite communication-in-motion earth station receives the feedback message of the network access request response to complete the network access process.
The invention has the following beneficial effects:
1. the invention has good applicability to high maneuvering platforms with wider range of motion, such as on-board and on-board, and adopts the satellite movable spot beam to maneuver and cover the high maneuvering target user, so that the communication-in-motion earth station of the high maneuvering satellite can perform open sea remote area communication under the accompanying guarantee of the mechanical movable spot beam.
2. The coverage area of the mechanically movable spot beam is approximately circular with the diameter of hundreds of kilometers, the gain of a beam antenna is relatively high, the spatial isolation of signals is good, and the mobile communication guarantee requirements of single satellite mobile communication earth station users or multiple satellite mobile communication earth station user groups can be met.
3. The invention is also applicable to mobile security communication which utilizes the mechanically movable spot beam on the satellite to provide relatively fixed coverage for satellite earth station users in a certain area for a period of time.
Drawings
Fig. 1 is a schematic diagram of an application of a high mobility satellite communication-in-motion system based on an on-board mechanically movable spot beam in an embodiment of the present invention.
Fig. 2 is a flowchart of a high mobility satellite communication-in-motion companion guarantee method based on an on-board mechanically movable spot beam in an embodiment of the present invention.
Fig. 3 is a flow chart of random access of a high mobility satellite earth station in a global signaling beam in an embodiment of the present invention.
Fig. 4 is a flow chart of a mechanically movable spot beam resource application of a high mobility satellite earth station under global signaling beams in an embodiment of the invention.
Fig. 5 is a flow chart of mechanically movable spot beam pointing and staring to a high mobility satellite earth station in motion in an embodiment of the present invention.
Fig. 6 is a flow chart of the network access of the high mobility satellite communication-in-motion earth station under the mechanically movable point wave user service link in an embodiment of the invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1, a high mobility satellite communication-in-motion system based on an on-board mechanically movable spot beam, comprising:
(1) A communication satellite of the space segment;
(2) A gateway station, a measurement and control station and a management and control center of the ground section;
(3) Satellite earth stations of the user segment;
(4) A satellite-to-ground link and an inter-satellite link.
The space section communication satellite provides a communication relay function for a satellite earth station of a user section, the orbit of the space section communication satellite is a geostationary orbit, a plurality of geostationary orbit satellites cover the whole world, a global signaling beam antenna and a plurality of mechanically movable spot beam antennas are configured for the effective load of each communication satellite, and a feed beam antenna and a regional beam antenna are also configured for the communication satellite covering the territory range.
The ground section gateway station, the measurement and control station and the management and control center are all positioned in the territory range and are interconnected through a ground network; the gateway station is positioned in the coverage area of the feed beam and provides a satellite-ground feed link for transmitting signaling data in a global signaling beam of a served satellite, service data of a user section, and service data and measurement and control data forwarded by an overseas satellite with invisible territory range through an inter-satellite link relay; the measurement and control station provides a satellite-to-ground remote control telemetry link, receives working state parameters of the load equipment acquired by the satellite measurement and control subsystem through a downlink telemetry link, transmits a remote control instruction to the satellite measurement and control subsystem through an uplink remote control link, and transmits the remote control instruction to the satellite equipment through a satellite data management system to be executed, so that the control of a ground section on the satellite load such as a mechanically movable spot beam antenna is realized; the management and control center completes management control, operation control, task planning and the like of the satellite.
The user segment satellite earth stations include high mobility satellite earth stations in motion under mechanically mobile spot beam coverage and various satellite earth stations in regional beam coverage.
The satellite-ground link comprises an uplink feed link and a downlink feed link between a ground section gateway station and an on-board feed beam antenna, a measurement and control link between the ground section measurement and control station and an on-board measurement and control subsystem, a random access link between a user section satellite earth station and an on-board global signaling beam antenna, and a user service link between the user section satellite earth station and a mechanically movable spot beam antenna and a regional beam antenna; the inter-satellite link is a space link between communication satellites, and supports relay transmission of inter-satellite communication service and measurement and control service.
The global signaling beam antenna adopts a horn antenna with a field of view of 17.4 degrees to the earth, forms a fixed coverage area covering 1/3 of the earth surface, and is used for random access of all satellite earth stations in a user section.
The mechanical movable spot beam antenna adopts a high-gain mechanical rotary parabolic antenna, and the antenna beam is projected on the surface of the earth to be an approximate circular coverage area with a diameter of hundreds of kilometers; the mechanically movable spot beam antenna rotates under the control of the command of the on-satellite measurement and control subsystem, the ground view field of the antenna rotating is 17.4 degrees, and a maneuvering coverage area covering 1/3 of the earth surface is formed; mechanically movable spot beams are used for user traffic links of high mobility satellite earth stations in the user segment.
The feed beam antenna is directed to a gateway station of the ground segment for forwarding signaling data and user traffic data of a high mobile satellite earth station under the mechanically movable spot beam over the feed link.
The regional beam antenna is used for covering the country territory and the surrounding or forming region of a specific region, and is used for covering all satellite earth user service links in the user section under the coverage area.
A satellite communication-in-motion accompanying guarantee method of a high mobility satellite based on a mechanically movable spot beam on the satellite, as shown in fig. 2, comprising the following steps:
(101) Powering on and starting up the high-mobility satellite communication-in-motion earth station equipment and completing self-checking, and switching to a process (102);
(102) The antenna control unit of the earth station in the mobile satellite communication in the high mobility reads pre-stored target satellite parameters (including parameters such as longitude, receiving and transmitting polarization mode, beacon frequency and the like of the satellite) and issues and sets the working parameters to the tracking receiver; the antenna control unit calculates parameters such as azimuth angle, pitch angle, polarization angle and the like of the antenna pointing according to the position of the high maneuvering platform, longitude and the like of the target satellite and points the antenna to the target satellite, and the tracking receiver completes a satellite forming process according to a closed-loop tracking mode and keeps a tracking locking state;
(103) The high mobility satellite communication-in-motion earth station initiates and completes a random access process under a global signaling beam;
(104) The high mobility satellite communication-in-motion earth station completes the application process of the mechanically movable spot beam resource under the global signaling beam;
(105) Mechanically movable spot beams point to and gaze at high mobility satellite earth stations in motion;
(106) The high mobility satellite communication-in-motion earth stands under the user service link of the mechanically movable point wave to finish the network access process;
(107) The high mobility satellite communication-in-motion earth station performs communication processes such as service calling and transmission under a user service link of a mechanically movable point wave;
(108) The high mobility satellite communication-in-motion earth station completes the release of the mechanically movable spot beam resources through signaling interaction under the global signaling beam;
(109) The satellite station in motion of high mobility satellite completes the exit of random access through signaling interaction under the global signaling beam.
As shown in fig. 3, the process (103) includes the steps of:
(301) The method comprises the steps that a high mobility satellite communication-in-motion earth station reads and sets channel parameters of a preset global signaling beam downlink access link, wherein the channel parameters comprise carrier frequency, channel rate, modulation coding mode and the like;
(302) The high mobility satellite communication-in-motion earth station receives and captures the carrier signal of the downlink access link of the global signaling beam; if the carrier synchronization and the demodulation decoding synchronization, the step (303) is performed; otherwise, continuing with step (302);
(303) The high mobility satellite communication-in-motion earth station receives a periodic broadcast notification signaling forwarded to a global signaling downlink by an uplink feed link of a gateway station from a management and control center on a downlink access link of a global signaling beam; if the broadcast notification signaling is received correctly, go to step (304); otherwise, continuing with step (303);
(304) The mobile earth station of the high mobility satellite analyzes, issues and sets channel parameters of the uplink of the global signaling beam in the broadcast notification signaling, wherein the channel parameters comprise carrier frequency, channel rate, modulation coding mode and the like;
(305) The high mobility satellite communication-in-motion earth station transmits a random access request message containing information such as user identity and authority of the earth station to a gateway station on a global signaling beam uplink access link;
(306) The gateway station transmits the random access request to the management and control center after receiving the random access request, and the management and control center performs identity authentication on the communication-in-motion earth station of the high maneuver satellite; if the verification is passed, the step (309) is carried out; otherwise, go to step (307);
(307) The control center sends a response message of refusing access to the mobile communication earth station of the high mobility satellite through a global signaling beam downlink access link by the gateway station;
(308) The earth station in communication with the high mobility satellite performs exception processing according to the reason in the refused access response message, and the step (305) is carried out after the processing is completed;
(309) The control center sends a response message allowing access to the mobile communication earth station of the high mobility satellite through a global signaling beam downlink access link by the gateway station;
(310) The high mobility satellite communication-in-motion earth station transmits an access confirmation message to the gateway station through the global signaling beam uplink, and the high mobility satellite communication-in-motion earth station completes the random access process under the global signaling beam.
As shown in fig. 4, the process (104) includes the steps of:
(401) The high mobility satellite communication-in-motion earth station initiates a request for using the mechanically movable spot beam resources through a global signaling beam uplink, and the request message comprises the contents of the current position of the earth station, whether a guarantee use mode is a mobility accompanying guarantee or a fixed coverage guarantee, the use duration and the like;
(402) The gateway station receives the message of the mechanical movable spot beam resource using request through the feed beam downlink and forwards the message to the control center through the ground network, and the control center generates a response feedback message of the request according to the available condition of the mechanical movable spot beam resource on the satellite; if the mechanical movable spot beam resources are allocated, the response feedback message comprises the beam numbers of the mechanical movable spot beams, and the information such as broadcast notification channel parameters of user service links under the mechanical movable spot beams; if the mechanical movable spot beam resources are not allocated, the response feedback message comprises information such as unallocated reasons, time for waiting continuously and the like;
(403) The control center forwards the response feedback information of the mechanical movable spot beam resource use request to the gateway station through the ground network, and the gateway station forwards the response feedback information to the downlink access link of the global signaling beam through the uplink of the feed beam through the satellite; if mechanically movable spot beam resources are allocated, performing step (406) synchronously;
(404) After receiving the response feedback message of the mechanical movable spot beam resource use request through the downlink access link of the global signaling beam, the high mobility satellite communication-in-motion earth station shifts to step (405) if the mechanical movable spot beam resource is not allocated; if mechanically movable spot beam resources are allocated, then go to step (407);
(405) The high mobility satellite communication-in-motion earth station is switched into a queuing waiting state according to the waiting time given in the feedback message; in the waiting process, if a feedback message that the mechanically movable spot beam resource is available is received through the global signaling beam downlink, the step (407) is shifted to; otherwise, after waiting for ending, go to step (401);
(406) The control center sends a calling instruction of the mechanical movable spot beam to the measurement and control station through the ground network, the measurement and control station sends a movement control instruction of the selected mechanical movable spot beam to the on-board measurement and control subsystem through the measurement and control link, and the on-board measurement and control subsystem directs the selected mechanical movable spot beam to the high-mobility satellite on-the-fly earth station;
(407) The high mobility satellite communication-in-motion earth station completes the application process of the mechanically movable spot beam resource use under the global signaling beam.
As shown in fig. 5, the process (105) includes the steps of:
(501) The high mobility satellite communication-in-motion earth station predicts the expected position of the next adjustment period of the mechanical movable spot beam according to the current position, the heading, the speed, the acceleration and other information of the high mobility satellite communication-in-motion earth station;
(502) The high mobility satellite communication-in-motion earth station reports the self expected position information to the gateway station through a user link under the mechanically movable spot beam;
(503) The gateway station receives the expected position report message from the high mobility satellite communication-in-motion earth station through the feed beam feed downlink;
(504) The gateway station reports the expected position of the high mobility satellite communication-in-motion earth station to a management and control center through a ground network, and the management and control center generates a movement instruction of a mechanical movable spot beam according to the expected position;
(505) The control center sends a movement instruction of the mechanical movable spot beam to the measurement and control station through the ground network, the measurement and control station sends a movement control instruction of the mechanical movable spot beam to the on-board measurement and control subsystem through the measurement and control link, and the on-board measurement and control subsystem directs the mechanical movable spot beam to the expected position of the high maneuver satellite on-the-fly earth station;
(506) If the situation that the tracking of the mobile satellite communication-in-motion earth station of the high mobile satellite is lost occurs, reporting an expected position message by the mobile satellite communication-in-motion earth station of the high mobile satellite through an access link under a global signaling beam, and rapidly recovering the mobile satellite communication-in-motion earth station of the high mobile satellite under the control of a management and control center;
(507) Steps (501) - (506) are performed in a loop to ensure that the mechanically movable spot beam is always directed and focused at the high mobility satellite earth station in motion.
As shown in fig. 6, process (106) includes the steps of:
(601) The mobile satellite communication-in-motion earth station sets parameters of a receiving channel according to the parameter content of a broadcast notification channel of a mechanical movable spot beam downlink user service link, receives broadcast notification signaling in the mechanical movable spot beam downlink user service link, analyzes the channel parameters of a user service uplink in the broadcast notification signaling and sets parameters of a transmitting channel if the broadcast notification signaling is received;
(602) The high mobility satellite communication-in-motion earth station initiates a network access request to a management and control center through a user service link under a mechanically movable spot beam;
(603) The management and control center completes network access verification and forwards a feedback message of the network access request response to the earth station of the mobile satellite of high mobility through the gateway station;
(604) And the high mobility satellite communication-in-motion earth station receives the feedback message of the network access request response to complete the network access process.
The foregoing examples illustrate only a few embodiments of the invention and are described in detail herein without thereby limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and principle of the present invention, and any modifications, equivalent substitutions and improvements made within the scope of the present invention are intended to be included in the scope of the present invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (10)
1. A high mobility satellite communication-in-motion system based on an on-board mechanically movable spot beam, comprising: communication satellites of space segments, gateway stations, measurement and control stations and management and control centers of ground segments, satellite earth stations, satellite-earth links and inter-satellite links of user segments;
the communication satellite provides a communication relay function for a satellite earth station, the orbit of the communication satellite is a geostationary orbit, a plurality of geostationary orbit satellites cover the world, the effective load of each communication satellite is provided with a global signaling beam antenna and a plurality of mechanically movable spot beam antennas, and the communication satellite covering the territory range is also provided with a feed beam antenna and a regional beam antenna;
The gateway station, the measurement and control station and the management and control center are all positioned in the territory range and are mutually interconnected through a ground network; the gateway station is positioned in the coverage area of the feed beam and provides a satellite-ground feed link for transmitting signaling data in a global signaling beam of a served satellite, service data of a user section, and service data and measurement and control data forwarded by an overseas satellite with invisible territory range through an inter-satellite link relay; the measurement and control station provides a satellite-to-ground remote control telemetry link, receives working state parameters of load equipment acquired by the satellite measurement and control subsystem through a downlink telemetry link, transmits remote control instructions to the satellite measurement and control subsystem through an uplink telemetry link, and transmits the remote control instructions to the satellite equipment through a satellite data management system to be executed, so that the control of a ground section on a mechanically movable spot beam antenna is realized; the management control center completes management control, operation control and task planning of the satellite;
the satellite earth stations comprise high mobility satellite communication-in-motion earth stations under the coverage of mechanical movable spot beams and various satellite earth stations under the coverage of regional beams;
The satellite-to-ground link comprises: an uplink and downlink feed link between the gateway station and the satellite feed beam antenna; a measurement and control link between the measurement and control station and the on-board measurement and control subsystem; a random access link between the satellite earth station and the on-board global signaling beam antenna; a user traffic link between the satellite earth station and the mechanically movable spot beam antenna and the area beam antenna;
the inter-satellite link is a space link between communication satellites, and supports relay transmission of inter-satellite communication service and measurement and control service.
2. The high mobility satellite communication-in-motion system based on mechanically movable spot beams on a satellite of claim 1, wherein the global signaling beam antenna is a horn antenna with a field of view of 17.4 ° to the earth, and is configured to cover a fixed coverage area of 1/3 of the earth's surface, and the global signaling beam is used for random access of all satellite earth stations in the user segment.
3. The high mobility satellite communication-in-motion system based on mechanically movable spot beams on a satellite of claim 1, wherein said mechanically movable spot beam antenna employs a high gain mechanically rotating parabolic antenna, the antenna beam being projected as an approximately circular footprint on the earth's surface; the mechanically movable spot beam antenna rotates under the control of the command of the on-satellite measurement and control subsystem, the ground view field of the antenna rotating is 17.4 degrees, and a maneuvering coverage area covering 1/3 of the earth surface is formed; mechanically movable spot beams are used for user traffic links of high mobility satellite earth stations in the user segment.
4. The satellite mobile communication system of claim 1, wherein the feed beam antenna is directed to a gateway station of the ground segment for forwarding signaling data and user traffic data of the satellite earth station of the satellite mobile satellite under the mechanically mobile spot beam via the feed link.
5. A satellite mobile satellite communication system according to claim 1, wherein the regional beam antenna is adapted to cover a country territory and surrounding or contoured area of a particular region for user traffic links covering all satellite earth in the user segment below.
6. The high-mobility satellite communication-in-motion accompanying guarantee method based on the mechanically movable spot beam is characterized by comprising the following steps of:
(1) Powering on and starting up the high-mobility satellite power-on earth station equipment and completing self-checking, and turning to the step (2);
(2) The antenna control unit of the high maneuvering satellite communication-in-motion earth station reads pre-stored target satellite parameters including longitude, receiving and transmitting polarization mode and beacon frequency of the satellite, and issues and sets the target satellite parameters to the tracking receiver; the antenna control unit calculates the azimuth angle, pitch angle and polarization angle parameters of the antenna pointing according to the position of the high maneuvering platform and the longitude of the target satellite, and points the antenna to the target satellite, and the tracking receiver completes the satellite-forming process according to a closed-loop tracking mode and keeps tracking and locking states;
(3) The high mobility satellite communication-in-motion earth station initiates and completes a random access process under a global signaling beam;
(4) The high mobility satellite communication-in-motion earth station completes the application process of the mechanically movable spot beam resource under the global signaling beam;
(5) Mechanically movable spot beams point to and gaze at high mobility satellite earth stations in motion;
(6) The high mobility satellite communication-in-motion earth stands under the user service link of the mechanically movable point wave to finish the network access process;
(7) The communication process of service calling and transmission is carried out by the earth station of the high mobility satellite communication in motion under the user service link of the mechanically movable point wave;
(8) The high mobility satellite communication-in-motion earth station completes the release of the mechanically movable spot beam resources through signaling interaction under the global signaling beam;
(9) The satellite station in motion of high mobility satellite completes the exit of random access through signaling interaction under the global signaling beam.
7. The high mobility satellite communication-in-motion companion guarantee method based on mechanically movable spot beams of claim 6, wherein the specific manner of step (3) is:
(301) The method comprises the steps that a high mobility satellite communication-in-motion earth station reads and sets channel parameters of a preset global signaling beam downlink access link, wherein the channel parameters comprise carrier frequency, channel rate and modulation coding modes;
(302) The high mobility satellite communication-in-motion earth station receives and captures the carrier signal of the downlink access link of the global signaling beam; if the carrier synchronization and the demodulation decoding synchronization, the step (303) is performed; otherwise, repeating step (302);
(303) The high mobility satellite communication-in-motion earth station receives a periodic broadcast notification signaling forwarded to a global signaling downlink by an uplink feed link of a gateway station from a management and control center on a downlink access link of a global signaling beam; if the broadcast notification signaling is received correctly, go to step (304); otherwise, repeating step (303);
(304) The mobile earth station of the high mobility satellite analyzes, issues and sets channel parameters of the uplink of the global signaling beam in the broadcast notification signaling, wherein the channel parameters comprise carrier frequency, channel rate and modulation coding mode;
(305) The high mobility satellite communication-in-motion earth station transmits a random access request message containing user identity and authority information of the earth station to a gateway station on a global signaling beam uplink access link;
(306) The gateway station transmits the random access request to the management and control center after receiving the random access request, and the management and control center performs identity authentication on the communication-in-motion earth station of the high maneuver satellite; if the verification is passed, the step (309) is carried out; otherwise, go to step (307);
(307) The control center sends a response message of refusing access to the mobile communication earth station of the high mobility satellite through a global signaling beam downlink access link by the gateway station;
(308) The earth station in communication with the high mobility satellite performs exception processing according to the reason in the refused access response message, and the step (305) is carried out after the processing is completed;
(309) The control center sends a response message allowing access to the mobile communication earth station of the high mobility satellite through a global signaling beam downlink access link by the gateway station;
(310) The high mobility satellite communication-in-motion earth station transmits an access confirmation message to the gateway station through the global signaling beam uplink, and the high mobility satellite communication-in-motion earth station completes the random access process under the global signaling beam.
8. The high mobility satellite communication-in-motion companion guarantee method based on mechanically movable spot beams of claim 6, wherein the specific manner of step (4) is:
(401) The high mobility satellite communication-in-motion earth station initiates a request for using the mechanically movable spot beam resources through a global signaling beam uplink, and the request message comprises the current position of the earth station and the content of guaranteeing whether a using mode is mobility accompanying guarantee or fixed coverage guarantee or using duration;
(402) The gateway station receives the message of the mechanical movable spot beam resource using request through the feed beam downlink and forwards the message to the control center through the ground network, and the control center generates a response feedback message of the request according to the available condition of the mechanical movable spot beam resource on the satellite; if the mechanical movable spot beam resources are allocated, the response feedback message comprises the beam number of the mechanical movable spot beam and the broadcast notification channel parameters of the user service link under the mechanical movable spot beam; if the mechanical movable spot beam resources are not allocated, the response feedback message comprises unallocated reasons and the time for waiting continuously;
(403) The control center forwards the response feedback information of the mechanical movable spot beam resource use request to the gateway station through the ground network, and the gateway station forwards the response feedback information to the downlink access link of the global signaling beam through the uplink of the feed beam through the satellite; if mechanically movable spot beam resources are allocated, performing step (406) synchronously;
(404) After receiving the response feedback message of the mechanical movable spot beam resource use request through the downlink access link of the global signaling beam, the high mobility satellite communication-in-motion earth station shifts to step (405) if the mechanical movable spot beam resource is not allocated; if mechanically movable spot beam resources are allocated, then go to step (407);
(405) The high mobility satellite communication-in-motion earth station is switched into a queuing waiting state according to the waiting time given in the feedback message; in the waiting process, if a feedback message that the mechanically movable spot beam resource is available is received through the global signaling beam downlink, the step (407) is shifted to; otherwise, after waiting for ending, go to step (401);
(406) The control center sends a calling instruction of the mechanical movable spot beam to the measurement and control station through the ground network, the measurement and control station sends a movement control instruction of the selected mechanical movable spot beam to the on-board measurement and control subsystem through the measurement and control link, and the on-board measurement and control subsystem directs the selected mechanical movable spot beam to the high-mobility satellite on-the-fly earth station;
(407) The high mobility satellite communication-in-motion earth station completes the application process of the mechanically movable spot beam resource use under the global signaling beam.
9. The high mobility satellite communication-in-motion companion guarantee method based on mechanically movable spot beams of claim 6, wherein the specific manner of step (5) is:
(501) The high mobility satellite communication-in-motion earth station predicts the expected position of the next adjustment period of the mechanical movable spot beam according to the current position, the heading, the speed and the acceleration of the station;
(502) The high mobility satellite communication-in-motion earth station reports the self expected position information to the gateway station through a user link under the mechanically movable spot beam;
(503) The gateway station receives the expected position report message from the high mobility satellite communication-in-motion earth station through the feed beam feed downlink;
(504) The gateway station reports the expected position of the high mobility satellite communication-in-motion earth station to a management and control center through a ground network, and the management and control center generates a movement instruction of a mechanical movable spot beam according to the expected position;
(505) The control center sends a movement instruction of the mechanical movable spot beam to the measurement and control station through the ground network, the measurement and control station sends a movement control instruction of the mechanical movable spot beam to the on-board measurement and control subsystem through the measurement and control link, and the on-board measurement and control subsystem directs the mechanical movable spot beam to the expected position of the high maneuver satellite on-the-fly earth station;
(506) If the situation that the tracking of the mobile satellite communication-in-motion earth station of the high mobile satellite is lost occurs, reporting an expected position message by the mobile satellite communication-in-motion earth station of the high mobile satellite through an access link under a global signaling beam, and rapidly recovering the mobile satellite communication-in-motion earth station of the high mobile satellite under the control of a management and control center;
(507) Steps (501) - (506) are performed in a loop to ensure that the mechanically movable spot beam is always directed and focused at the high mobility satellite earth station in motion.
10. The high mobility satellite communication-in-motion companion guarantee method based on mechanically movable spot beams of claim 6, wherein the specific manner of step (6) is:
(601) The mobile satellite communication-in-motion earth station sets parameters of a receiving channel according to the parameter content of a broadcast notification channel of a mechanical movable spot beam downlink user service link, receives broadcast notification signaling in the mechanical movable spot beam downlink user service link, and analyzes the channel parameters of a user service uplink in the broadcast notification signaling and sets parameters of a transmitting channel if the broadcast notification signaling is received;
(602) The high mobility satellite communication-in-motion earth station initiates a network access request to a management and control center through a user service link under a mechanically movable spot beam;
(603) The management and control center completes network access verification and forwards a feedback message of the network access request response to the earth station of the mobile satellite of high mobility through the gateway station;
(604) And the high mobility satellite communication-in-motion earth station receives the feedback message of the network access request response to complete the network access process.
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